| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.felix.dm; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.felix.dm.compat.DependencyManagerCompat; |
| import org.apache.felix.dm.impl.AdapterServiceImpl; |
| import org.apache.felix.dm.impl.AspectServiceImpl; |
| import org.apache.felix.dm.impl.BundleAdapterImpl; |
| import org.apache.felix.dm.impl.BundleDependencyImpl; |
| import org.apache.felix.dm.impl.ComponentImpl; |
| import org.apache.felix.dm.impl.ComponentScheduler; |
| import org.apache.felix.dm.impl.ConfigurationDependencyImpl; |
| import org.apache.felix.dm.impl.FactoryConfigurationAdapterImpl; |
| import org.apache.felix.dm.impl.ResourceAdapterImpl; |
| import org.apache.felix.dm.impl.ResourceDependencyImpl; |
| import org.apache.felix.dm.impl.ServiceDependencyImpl; |
| import org.apache.felix.dm.impl.TemporalServiceDependencyImpl; |
| import org.apache.felix.dm.impl.index.ServiceRegistryCache; |
| import org.apache.felix.dm.impl.index.ServiceRegistryCacheManager; |
| import org.apache.felix.dm.impl.metatype.PropertyMetaDataImpl; |
| import org.osgi.framework.BundleContext; |
| |
| /** |
| * The dependency manager manages all components and their dependencies. Using |
| * this API you can declare all components and their dependencies. Under normal |
| * circumstances, you get passed an instance of this class through the |
| * <code>DependencyActivatorBase</code> subclass you use as your |
| * <code>BundleActivator</code>, but it is also possible to create your |
| * own instance. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class DependencyManager extends DependencyManagerCompat { |
| /** |
| * The DependencyManager Activator will wait for a threadpool before creating any DM components if the following |
| * OSGi system property is set to true. |
| */ |
| public final static String PARALLEL = "org.apache.felix.dependencymanager.parallel"; |
| |
| public static final String ASPECT = "org.apache.felix.dependencymanager.aspect"; |
| public static final String SERVICEREGISTRY_CACHE_INDICES = "org.apache.felix.dependencymanager.filterindex"; |
| public static final String METHOD_CACHE_SIZE = "org.apache.felix.dependencymanager.methodcache"; |
| |
| private final BundleContext m_context; |
| private final Logger m_logger; |
| private final ConcurrentHashMap<Component, Component> m_components = new ConcurrentHashMap<>(); |
| |
| private static final Set<WeakReference<DependencyManager>> m_dependencyManagers = new HashSet<>(); |
| |
| /** |
| * Creates a new dependency manager. You need to supply the |
| * <code>BundleContext</code> to be used by the dependency |
| * manager to register services and communicate with the |
| * framework. |
| * |
| * @param context the bundle context |
| */ |
| public DependencyManager(BundleContext context) { |
| this(context, new Logger(context)); |
| } |
| |
| DependencyManager(BundleContext context, Logger logger) { |
| m_context = createContext(context); |
| m_logger = logger; |
| synchronized (m_dependencyManagers) { |
| m_dependencyManagers.add(new WeakReference<DependencyManager>(this)); |
| } |
| } |
| |
| public Logger getLogger() { |
| return m_logger; |
| } |
| |
| /** |
| * Returns the list of currently created dependency managers. |
| * @return the list of currently created dependency managers |
| */ |
| public static List<DependencyManager> getDependencyManagers() { |
| List<DependencyManager> result = new ArrayList<>(); |
| synchronized (m_dependencyManagers) { |
| Iterator<WeakReference<DependencyManager>> iterator = m_dependencyManagers.iterator(); |
| while (iterator.hasNext()) { |
| WeakReference<DependencyManager> reference = iterator.next(); |
| DependencyManager manager = reference.get(); |
| if (manager != null) { |
| try { |
| manager.getBundleContext().getBundle(); |
| result.add(manager); |
| continue; |
| } |
| catch (IllegalStateException e) { |
| } |
| } |
| iterator.remove(); |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the bundle context associated with this dependency manager. |
| * @return the bundle context associated with this dependency manager. |
| */ |
| public BundleContext getBundleContext() { |
| return m_context; |
| } |
| |
| /** |
| * Adds a new component to the dependency manager. After the service is added |
| * it will be started immediately. |
| * |
| * @param c the service to add |
| */ |
| public void add(Component c) { |
| m_components.put(c, c); |
| ComponentScheduler.instance().add(c); |
| } |
| |
| /** |
| * Removes a service from the dependency manager. Before the service is removed |
| * it is stopped first. |
| * |
| * @param c the component to remove |
| */ |
| public void remove(Component c) { |
| ComponentScheduler.instance().remove(c); |
| m_components.remove(c); |
| } |
| |
| /** |
| * Creates a new component. |
| * |
| * @return the new component |
| */ |
| public Component createComponent() { |
| return new ComponentImpl(m_context, this, m_logger); |
| } |
| |
| /** |
| * Creates a new service dependency. |
| * |
| * @return the service dependency |
| */ |
| public ServiceDependency createServiceDependency() { |
| return new ServiceDependencyImpl(); |
| } |
| |
| /** |
| * Creates a new configuration dependency. |
| * |
| * @return the configuration dependency |
| */ |
| public ConfigurationDependency createConfigurationDependency() { |
| return new ConfigurationDependencyImpl(m_context, m_logger); |
| } |
| |
| /** |
| * Creates a new bundle dependency. |
| * |
| * @return a new BundleDependency instance. |
| */ |
| public BundleDependency createBundleDependency() { |
| return new BundleDependencyImpl(); |
| } |
| |
| /** |
| * Creates a new resource dependency. |
| * |
| * @return the resource dependency |
| */ |
| public ResourceDependency createResourceDependency() { |
| return new ResourceDependencyImpl(); |
| } |
| |
| /** |
| * Creates a new timed required service dependency. A timed dependency blocks the invoker thread is the required dependency |
| * is currently unavailable, until it comes up again. |
| * |
| * @return a new timed service dependency |
| */ |
| public ServiceDependency createTemporalServiceDependency(long timeout) { |
| return new TemporalServiceDependencyImpl(m_context, timeout); |
| } |
| |
| /** |
| * Creates a new adapter component. The adapter will be applied to any service that |
| * matches the specified interface and filter. For each matching service |
| * an adapter will be created based on the adapter implementation class. |
| * The adapter will be registered with the specified interface and existing properties |
| * from the original service plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @return an adapter component |
| */ |
| public AdapterComponent createAdapterComponent() { |
| return new AdapterServiceImpl(this); |
| } |
| |
| /** |
| * Creates a new Factory Component. For each new factory configuration matching |
| * the factoryPid, a component will be created based on the component implementation class. |
| * The component will be registered with the specified interface, and with the specified service properties. |
| * Depending on the <code>propagate</code> parameter, every public factory configuration properties |
| * (which don't start with ".") will be propagated along with the adapter service properties. |
| * It will also inherit all dependencies. |
| * |
| * @return a factory pid component |
| */ |
| public FactoryComponent createFactoryComponent() { |
| return new FactoryConfigurationAdapterImpl(this); |
| } |
| |
| /** |
| * Creates a new bundle adapter. The adapter will be applied to any bundle that |
| * matches the specified bundle state mask and filter condition. For each matching |
| * bundle an adapter will be created based on the adapter implementation class. |
| * The adapter will be registered with the specified interface |
| * |
| * TODO and existing properties from the original resource plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @return a service that acts as a factory for generating bundle adapters |
| */ |
| public BundleComponent createBundleComponent() { |
| return new BundleAdapterImpl(this); |
| } |
| |
| /** |
| * Creates a new resource adapter component. The adapter will be applied to any resource that |
| * matches the specified filter condition. For each matching resource |
| * an adapter will be created based on the adapter implementation class. |
| * The adapter will be registered with the specified interface and existing properties |
| * from the original resource plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @return a Resource Adapter Component |
| */ |
| public ResourceComponent createResourceComponent() { |
| return new ResourceAdapterImpl(this); |
| } |
| |
| /** |
| * Returns a list of components. |
| * |
| * @return a list of components |
| */ |
| public List<Component> getComponents() { |
| return Collections.list(m_components.elements()); |
| } |
| |
| /** |
| * Creates a new aspect component. The aspect will be applied to any service that |
| * matches the specified interface and filter. For each matching service |
| * an aspect will be created based on the aspect implementation class. |
| * The aspect will be registered with the same interface and properties |
| * as the original service, plus any extra properties you supply here. |
| * It will also inherit all dependencies, and if you declare the original |
| * service as a member it will be injected. |
| * |
| * @return an aspect component |
| */ |
| public AspectComponent createAspectComponent() { |
| return new AspectServiceImpl(this); |
| } |
| |
| /** |
| * Removes all components and their dependencies. |
| */ |
| public void clear() { |
| for (Component component : m_components.keySet()) { |
| remove(component); |
| } |
| m_components.clear(); |
| } |
| |
| /** |
| * Creates a new configuration property metadata. |
| * |
| * @return the configuration property metadata. |
| */ |
| public PropertyMetaData createPropertyMetaData() { |
| return new PropertyMetaDataImpl(); |
| } |
| |
| private BundleContext createContext(BundleContext context) { |
| ServiceRegistryCache cache = ServiceRegistryCacheManager.getCache(); |
| if (cache != null) { |
| return cache.createBundleContextInterceptor(context); |
| } |
| else { |
| return context; |
| } |
| } |
| } |